package org.shj.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;

/**
 * Servlet Filter implementation class CharsetFilter
 */
@WebFilter(filterName="CharsetFilter", urlPatterns="/*")
public class CharsetFilter implements Filter {

    /**
     * Default constructor. 
     */
    public CharsetFilter() {
        System.out.println("====== CharsetFilter()");
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		System.out.println("====== destroy()");
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		System.out.println("====== do charset Filter");
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");
		response.setContentType("text/html;charset=UTF-8");
		chain.doFilter(request, response);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		System.out.println("======= init charset filter");
	}

}
